For the purpose of utilization of the residual oil for ironmaking as a new energy resource, the development of an injection technique of petroleum coke-oil slurry into a blast furnace was undertaken.
First, from the laboratory test, it became clear that the viscosity and the settling velocity of petroleum coke-oil slurries were much dependent on the brand of petroleum coke ; delayed coke (DC) and fluid coke (FC). Namely, DC slurry has much higher viscosity than FC slurry and the settling velocity of FC in the slurry is higher than that of DC.
Next, transportation characteristics of slurries in the pipelines were studied by the use of the pilot plant. The results obtained are as follows. (1) Petroleum coke-oil slurries may be treated as a Newtonian fluid under these experimental conditions. (2) On planning the injection system, the viscosity for calculating pressure loss can be adopted 0.8-1.0 times as high as the viscosity measured by the viscometer according to the brand of petroleum coke.
